GitLab

In order to move InfoBarDelegate to the infobar components, all dependencies on
content/ must be removed.
This CL removes the InfoBarDelegate::web_contents() method and callers use
InfoBarService::WebContentsFromInfobar() instead.

BUG=354379
TBR=jochen

Review URL: https://codereview.chromium.org/230453004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@263044 0039d316-1c4b-4281-b951-d872f2087c98